[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT ID FROM b_iblock_41_index_val WHERE VALUE = 'RUB'
LIMIT 0, 1

/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, NULL, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string, NULL, integer, integer)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:358
#2: Bitrix\Main\DB\Connection->queryScalar(string)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/dictionary.php:132
#3: Bitrix\Iblock\PropertyIndex\Dictionary->getStringId(string, boolean)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:806
#4: Bitrix\Iblock\PropertyIndex\Facet->enableCurrencyConversion(string, array)
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:131
#5: Bitrix\Iblock\PropertyIndex\QueryBuilder->getFilterSql(array, array)
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:665
#6: CAllIBlockElement->MkFilter(array, array, array)
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:3095
#7: CAllIBlockElement->PrepareGetList(array, array, array, string, array, array, NULL, NULL, array, boolean, string, array, array, array)
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:343
#8: CIBlockElement->prepareSql(array, array, boolean, array)
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:666
#9: CIBlockElement::GetList(array, array, boolean, array, array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:1715
#10: Bitrix\Iblock\Component\Base->getSeparateList(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:1680
#11: Bitrix\Iblock\Component\Base->getElementList(integer, NULL)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/elementlist.php:1014
#12: Bitrix\Iblock\Component\ElementList->getElementList(integer, NULL)
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:537
#13: CatalogSectionComponent->getElementList(integer, NULL)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:793
#14: Bitrix\Iblock\Component\Base->initElementList()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:580
#15: CatalogSectionComponent->initElementList()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4048
#16: Bitrix\Iblock\Component\Base->processResultData()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:92
#17: CatalogSectionComponent->processResultData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4551
#18: Bitrix\Iblock\Component\Base->loadData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/elementlist.php:1232
#19: Bitrix\Iblock\Component\ElementList->loadData()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4540
#20: Bitrix\Iblock\Component\Base->initialLoadAction()
	/home/bitrix/www/bitrix/components/bitrix/catalog.section/class.php:334
#21: CatalogSectionComponent->initialLoadAction()
	
#22: call_user_func(array)
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4725
#23: Bitrix\Iblock\Component\Base->doAction()
	/home/bitrix/www/bitrix/modules/iblock/lib/component/base.php:4743
#24: Bitrix\Iblock\Component\Base->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#25: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#26: CAllMain->IncludeComponent(string, string, array, object)
	/home/bitrix/www/bitrix/templates/magnet_s2/components/bitrix/catalog/main/section.php:450
#27: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#28: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#29: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#30: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#31: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/component.php:171
#32: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#33: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#34: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#35: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/bitrix/ext_www/s2/index.php:782
#36: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#37: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2